18343311277 has 2 divisors, whose sum is σ = 18343311278. Its totient is φ = 18343311276.

The previous prime is 18343311263. The next prime is 18343311307. The reversal of 18343311277 is 77211334381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10482892996 + 7860418281 = 102386^2 + 88659^2 .

It is a cyclic number.

It is not a de Polignac number, because 18343311277 - 2⁷ = 18343311149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18343311247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9171655638 + 9171655639.

It is an arithmetic number, because the mean of its divisors is an integer number (9171655639).

Almost surely, 2^18343311277 is an apocalyptic number.

It is an amenable number.

18343311277 is a deficient number, since it is larger than the sum of its proper divisors (1).

18343311277 is an equidigital number, since it uses as much as digits as its factorization.

18343311277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 40.

The spelling of 18343311277 in words is "eighteen billion, three hundred forty-three million, three hundred eleven thousand, two hundred seventy-seven".